/* Utilites */

//jsnAddEvent - attach a function to an event
function jsnAddEvent(target, event, func){
	if (target.addEventListener){
		target.addEventListener(event, func, false);
		return true;
	} else if (target.attachEvent){
		var result = target.attachEvent("on"+event, func);
		return result;
	} else {
		return false;
	}
}

function jsnCheckSubstring(targetString, targetSubstring, delimeter)
{
	var parts = targetString.split(delimeter);
	for (var i = 0; i < parts.length; i++){
		if (parts[i] == targetSubstring) return true;
	}
	return false;
}

function jsnGetElementsByClass(targetParent, targetTag, targetClass)
{
	if(!targetParent.getElementsByTagName) return;

	var elements, tags;

	tags = targetParent.getElementsByTagName(targetTag);
	elements = [];

	for(var i=0;i<tags.length;i++){
		if(jsnCheckSubstring(tags[i].className, targetClass, " ")){
			elements[elements.length] = tags[i];
		}
	}

	return elements;
}

function jsnDigTag(targetTag, targetName, digLevel)
{
	if(digLevel) {
		var n, d;
		n = targetTag.childNodes;
		for(var i=0;i<n.length;i++){
			d = n[i];
			if(d.tagName == targetName)
				return jsnDigTag(d, targetName, --digLevel);
		}
	}
	return targetTag;
}

function jsnWriteCookie(name,value,days)
{
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	} else expires = "";

	document.cookie = name+"="+value+expires+"; path=/";
}

function jsnReadCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}


/* Menu functions */
function jsnMakeDivMenu(menuClass)
{
	var lists = jsnGetElementsByClass(document, "UL", menuClass);
	for(var i=0;i<lists.length;i++){
		var list = lists[i];
		var listItems;

		if(list != undefined) {
			listItems = list.getElementsByTagName("LI");
			listItems[0].style.border = "none";
		}
	}
}

function jsnMakeIconMenu(menuClass, icons)
{
	var lists = jsnGetElementsByClass(document, "UL", menuClass);
	var iconId = 0;

	for(var i=0;i<lists.length;i++){
		var list = lists[i];
		var listItems;

		if(list != undefined) {
			listItems = list.getElementsByTagName("LI");
			for(var j=0;j<listItems.length;j++){
				listItems[j].firstChild.style.backgroundImage = 'url(' + icons[iconId] + ')';
				iconId = (iconId >= icons.length-1)?1:iconId+1;
			}
		}
	}
}



/* Accessibility functions */

function jsnSetFontSize(targetId, fontSize){
	var targetObj = (document.getElementById) ? document.getElementById(targetId) : document.all(targetId);
	targetObj.style.fontSize = fontSize + '%';
	//alert (document.body.style.fontSize);
         //var _showfontsize = (document.getElementById) ? document.getElementById(showfontsize) : document.all(showfontsize);
         //alert("");
         //document.all.showfontsize.innerHTML = document.body.style.fontSize;
         //document.all.showfontsize.innerText = document.body.style.fontSize;

}

<!--#######################################################################-->
var prefsLoaded = false;
var defaultFontSize = 75;
var currentFontSize = defaultFontSize;

function jsnChangeFontSize(sizeDifference){
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 2.5);

	if(currentFontSize > 100){
		currentFontSize = 100;
	}else if(currentFontSize < 40){
		currentFontSize = 30;
	}

	jsnSetFontSize("jsn-master", currentFontSize);
}

function jsnResetFontSize(){
	currentFontSize = defaultFontSize;
	jsnChangeFontSize(0);
}

function jsnLoadPrefs(){
	if(!prefsLoaded){
		cookie = jsnReadCookie("fontSize");
		currentFontSize = cookie ? cookie : defaultFontSize;
		jsnChangeFontSize(0);

		prefsLoaded = true;
	}
}

function jsnSavePrefs(){ jsnWriteCookie("fontSize", currentFontSize, 365); }

function jsnInitTemplate(){
	// Set accessibility preferences
	jsnLoadPrefs();
}

function jsnFinalizeTemplate(){
	// Save accessibility preferences
	jsnSavePrefs();
}

jsnAddEvent(window, 'load', jsnInitTemplate);
jsnAddEvent(window, 'unload', jsnFinalizeTemplate);